diff options
Diffstat (limited to 'src/pkg/crypto/sha256/sha256.go')
| -rw-r--r-- | src/pkg/crypto/sha256/sha256.go | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/src/pkg/crypto/sha256/sha256.go b/src/pkg/crypto/sha256/sha256.go index dc0e18f50..d69ed24a3 100644 --- a/src/pkg/crypto/sha256/sha256.go +++ b/src/pkg/crypto/sha256/sha256.go @@ -134,9 +134,16 @@ func (d *digest) Write(p []byte) (nn int, err error) { func (d0 *digest) Sum(in []byte) []byte { // Make a copy of d0 so that caller can keep writing and summing. d := *d0 + hash := d.checkSum() + if d.is224 { + return append(in, hash[:Size224]...) + } + return append(in, hash[:]...) +} - // Padding. Add a 1 bit and 0 bits until 56 bytes mod 64. +func (d *digest) checkSum() [Size]byte { len := d.len + // Padding. Add a 1 bit and 0 bits until 56 bytes mod 64. var tmp [64]byte tmp[0] = 0x80 if len%64 < 56 { @@ -157,10 +164,8 @@ func (d0 *digest) Sum(in []byte) []byte { } h := d.h[:] - size := Size if d.is224 { h = d.h[:7] - size = Size224 } var digest [Size]byte @@ -171,5 +176,24 @@ func (d0 *digest) Sum(in []byte) []byte { digest[i*4+3] = byte(s) } - return append(in, digest[:size]...) + return digest +} + +// Sum256 returns the SHA256 checksum of the data. +func Sum256(data []byte) [Size]byte { + var d digest + d.Reset() + d.Write(data) + return d.checkSum() +} + +// Sum224 returns the SHA224 checksum of the data. +func Sum224(data []byte) (sum224 [Size224]byte) { + var d digest + d.is224 = true + d.Reset() + d.Write(data) + sum := d.checkSum() + copy(sum224[:], sum[:Size224]) + return } |